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ASTM D – 08 Standard Test Methods for Measuring Adhesion by Tape Test
More importantly, in this instance the test is being applied beyond its intended scope. Cut through the lm to the substrate in one steady motion using just sufficient pressure on the cutting tool to have the cutting edge reach the substrate.
NOTE 3—It should be recognized that differences in adherability of the coating surface can affect the results obtained with coatings having the same inherent adhesion. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
D — 08 Standard Test Methods for Measuring Adhesion by Tape Test1 This standard is issued under the xed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. Criteria deemed d335-908 for a test to warrant large-scale acceptance aastm These effects are related as they reflect certain rheological properties of the backing and adhesive that are molecular in origin.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. However, with the d33559-08 test, failures within the substrate or coating layers are rare because the tape adhesive is not usually strong enough to exceed the cohesive strengths of normal substrates and organic coatings.
This standard has been approved for use by agencies of the Department of Defense.
ASTM D3359 Measuring Adhesion by Tape Test
It is assumed that coating removal occurs when the tensile force generated along the latter interface, which is a function of the sstm properties of the backing and adhesive layer materials, is greater than the bond strength at the coating-substrate interface or cohesive strength of the coating.
Also, Test Method B is not considered suitable for asmt thicker than 5 mils ? The values given in parentheses are for information only. Test Methods D was developed with metal as awtm substrate and, in the absense of supporting precision and bias data, is so limited.
Smooth the tape into place by nger in the area of the incisions and then rub rmly with the eraser on the end of a pencil. The values given in parentheses are for information only. No items in cart. Smooth the tape into place by finger in the area of the incisions and then rub firmly with the eraser on the end of a pencil. Link to Active This xstm will always route to the current Active version of the standard.
ASTM D 3359 – 09 Standard Test Methods for Measuring Adhesion by Tape Test
After drying or testing the coating, conduct the tape test at room temperature as defined in Specification D, unless D standard temperature is required or agreed. A similar test method, ISOpermits tests on soft substrates for example, wood and plaster. Common methods which approach the direct tests are peel, lapshear, and tensile tests.
Adhesion is then rated by comparing film removed against an established rating scale. Because the substrate and its surface preparation or lack of it have a drastic effect on the adhesion of coatings, a method to evaluate adhesion of a coating to different substrates or surface treatments, or of different coatings to the same substrate and treatment, is of considerable usefulness in the industry.
It should be noted, however, that multitip cutters8 provide good results only on test areas sufficiently plane that all cutting edges contact the substrate to the same degree. Note 3—It should be recognized that differences in adherability of the coating surface can affect the results obtained with coatings having the same inherent adhesion. Issues with plastic substrates are noted in Appendix X1.
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. The values given in parentheses are for information only.
It is of particular importance that the cutting edges be in good condition. Rate the adhesion in accordance with the following scale illustrated in Fig.
Link to Active This link will always route to the current Active version of the standard. But it can also be said that it is possible to obtain an indication of relative adhesion performance. It is not unexpected that different operators might obtain different results 7, 8. Precision and Bias5 9. For multicoat systems where adhesion failure may occur between or within coats, the adhesion of the coating system to the substrate is not determined.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.
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For tests in the eld, ensure that the surface is clean and dry. Further, the tape test does not give an absolute value for the force required for bond rupture, but serves only as an indicator that some minimum value for bond strength was met or exceeded 7, 8.
Last previous edition approved in as D — Wish List Please contact us first before donating any of these items. Small flakes of the coating are detached along edges and at intersections of cuts.
Discard cutting tools that develop nicks or other defects that tear the lm. Originally approved in Enter your account email address to request a password reset: Variation in pull rate and peel angle can effect large differences in test values and must be minimized to assure reproducibility 9. A similar test method, ISOpermits tests on soft substrates for example, wood and plaster.
ASTM D – 17 Standard Test Methods for Rating Adhesion by Tape Test
Committee D01 has identied the location of selected changes to this standard since the last issue D – 02 that may impact the use of this standard.
The intra- and inter-laboratory precision of this test method is similar to other test methods for coated substrates d33359-08 example, Test Method D and Test Method Dand is insensitive to all d359-08 large differences in adhesion. Justification for the cutting step is reasonable as cutting provides a free edge from which peeling can begin without having to overcome the cohesive strength of the coating layer. Active view current version of standard Translated Standard: A significant compressive force arises from the response of the tape backing material to being stretched.